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  1. #1
    Join Date
    May 2005
    Posts
    1,347

    why are txv solder connections so short??

    i just soldered a txv into a new evaporator, theres a ton of room in the evaporator
    but the txv seem to have as short a connection as they can make...


  2. #2
    Join Date
    May 2010
    Location
    Oxford, UK
    Posts
    336
    I mostly fit danfoss valves, often find it easier to put some stubs on the valve before fitting where access isn't good in its correct position.

  3. #3
    Join Date
    May 2005
    Posts
    1,347
    i installed a danfoss the other day, i went to set the superheat and was suprised the adjustment was on the side...do u use regular silver solder on those??

  4. #4
    Join Date
    Oct 2011
    Location
    between here and over there
    Posts
    453
    I find using flux and a little 15% does wonders on those. I don't like how they are so close to to the body makes me nervous installing them. doing all that work just to find that you burned it up installing it..
    ®

  5. #5
    Join Date
    Sep 2007
    Location
    NH
    Posts
    1,136
    Quote Originally Posted by primmers View Post
    i installed a danfoss the other day, i went to set the superheat and was suprised the adjustment was on the side...do u use regular silver solder on those??
    LOL.. Yep don't ever try to unscrew the bottom to adjust it you'll be in for a surprise.

    As far as short connections on the valves, I'm guess its a cost thing. I just try to burn it in real quick with little 1/2" or so strip of wet rag wrapped around it. With the danfoss valves you heat the pipe mostly then just touch the fitting when the pipe is hot enough.

    I get more pissed at the short connections on filter driers then txvs. Got to love the smell of burning paint.

  6. #6
    Join Date
    Sep 2007
    Location
    NH
    Posts
    1,136

  7. #7
    Join Date
    May 2010
    Location
    Oxford, UK
    Posts
    336
    Quote Originally Posted by primmers View Post
    i installed a danfoss the other day, i went to set the superheat and was suprised the adjustment was on the side...do u use regular silver solder on those??
    These are the sort of valves we get here, (this is on a bulk milk cooler)

    http://www.youtube.com/watch?v=V5C4LqDADNA

    I wrap the valve in a wet rag and have a pepper pot burner on the oxy acetylene torch. I use 15% silver rods and no flux as the rods are self fluxing on copper and copper plated fitting.

  8. #8
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    17,911
    I'd want to see that Danfoss valve in use after that. Not just pipes in a lab.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

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  9. #9
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    The more we burn up the more they sell us.

  10. #10
    Join Date
    Jun 2012
    Posts
    116
    changed a lot of danfosses on Manitowoc ice machines, put a wet rag on them and they're fine, those are all Danfoss TUC series valves

  11. #11
    Join Date
    Mar 2007
    Location
    wedged in freezer shelf
    Posts
    6,571
    Quote Originally Posted by timebuilder View Post
    I'd want to see that Danfoss valve in use after that. Not just pipes in a lab.
    timebuilder Have you ever brazed in a Danfoss like they show? The Stainless is so thin I would hold the valve by the head while you braze it. You could grab the body shortly after. They show much more heat than is needed IMO.
    “If You Can Dodge A Wrench You Can Dodge A Ball”

  12. #12
    Join Date
    Jul 2011
    Location
    Lehigh Valley, PA
    Posts
    427
    Quote Originally Posted by monkeyspanners View Post
    These are the sort of valves we get here, (this is on a bulk milk cooler)

    http://www.youtube.com/watch?v=V5C4LqDADNA

    I wrap the valve in a wet rag and have a pepper pot burner on the oxy acetylene torch. I use 15% silver rods and no flux as the rods are self fluxing on copper and copper plated fitting.
    That's long stem cryogenic valve used a cryo system. That brand valve is made in England. I installed a bunch of them on liquid cryo stations.

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